Blockade of interscalene brachial plexus has been used to provide anesthesia and analgesia for all types of surgery of the upper extremity and shoulder. Several serious complications such as spinal, epidural and subdural anesthesia have been described as a result of interscalene brachial plexus block. This case report describes a subdural block complication, developed after attempted posterior approach brachial plexus blockade for analgesia of the shoulder, upper arm and axillary region in a patient undergoing segmental mastectomy and axillary lymph node dissection with general anesthesia.
Keywords: Brachial plexus, complication, subdural block